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Relating to what is now called the Plutonic theory of the earth, first advanced by Dr. James Hutton. Lyell.

gh the main pipe, and so on alternately. -- Hydraulic valve. (Mach.) (a) A valve for regulating the distribution of water in the cylinders of hydraulic elevators, cranes, etc. (b) (Gas Works) An inverted cup with a partition dipping into water, for opening or closing communication between two gas mains, the open ends…

Relating to, or connected with, hydrocephalus, or dropsy of the brain.

r porcelain, is the agent employed in etching glass, and is preserved only in vessels of platinum, lead, caoutchouc, or gutta-percha.

Of or relating to hydrography.

Of or relating to hydrostatics; pertaining to, or in accordance with, the principles of the equilibrium of fluids. The first discovery made in hydrostatics since the time of Archimedes is due to Stevinus. Hallam. Hydrostatic balance, a balance for weighing substances in water, for the purpose of ascertaining their spec…

Relating to Hygeia, the goddess of health; of or pertaining to health, or its preservation.

Relating to hymns, or sacred lyrics. Donne.

Relating to, containing, or of the nature of, hyperbole; exaggerating or diminishing beyond the fact; exceeding the truth; as, an hyperbolical expression. "This hyperbolical epitaph." Fuller. Hyperbolic functions (Math.), certain functions which have relations to the hyperbola corresponding to those which sines, cosine…

Relating to the production of hypnotic sleep; as, the so-called hypnogenic pressure points, pressure upon which is said to cause an attack of hypnotic sleep. De Watteville.

Relating to, or connected with, the hypoblast; as, the hypoic sac.

Relating to hypostasis, or substance; hence, constitutive, or elementary. The grand doctrine of the chymists, touching their three hypostatical principles. Boyle.

the ninth letter of the English alphabet, takes its form from the Phoenician, through the Latin and the Greek. The Phoenician letter was probably of Egyptian origin. Its original value was nearly the same as that of the Italian I, or long e as in mete. Etymologically I is most closely related to e, y, j, g; as in dint,…

An adjective suffix signifying relating or belonging to, of the nature of, tending to; as affirmative, active, conclusive, corrective, diminutive.

A suffix signifying, in general, relating to, or characteristic of; as, historic, hygienic, telegraphic, etc.

ack, an irregular mass of broken and drifting ice. -- Ice paper, a transparent film of gelatin for copying or reproducing; papier glacé. -- Ice petrel (Zoöl.), a shearwater (Puffinus gelidus) of the Antarctic seas, abundant among floating ice. -- Ice pick, a sharp instrument for breaking ice into small pieces. -- I…

Of or pertaining to Iceland; relating to, or resembling, the Icelanders.

ow infinite the fall of this word, since the time where Milton sang of the Creator contemplating his newly- created world, -"how it showed . . . Answering his great idea," -to its present use, when this person "has an idea that the train has started," and the other "had no idea that the dinner would be so bad!" Trench.…

Of or relating to ideology.

which is peculiar to a particular language. J. H. Newman. He followed their language [the Latin], but did not comply with the idiom of ours. Dryden.